Picking mechanism for looms.



No. 876,011. PATENTED JAN. 7. 1908.

G. F. PERHAM. PIGKING MECHANISM FOR LOOMS.

APPLICATION FILED AUG. 27. 1904.

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APPLICATION FILED AUG-27.1904.

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PICKING MECHANISM FOR LOOMS.

Specification of Letters Patent.

Patented Jan. '7, 12108.

Application filed August 2'7. 1904. Serial No. 222,430.

T 0 all whom it may concern.-

Be it known that 1, CHARLES F. PERIIAM, of Lowell, in the county of Middlesex and State of Massachusetts, have invented eertain new and useful Improvements in Picking Mechanism for Looms, of which the following is a specification.

This invention has relation to looms,- and more particularly to the picking mechanism.

The picking mechanism of the usual comrnercial loom includes a picker-sti ck which is supported at its lower end and reciprocates in a slot in the shuttle-box. The movement of the picker-stick is necessarily violent in order to throw the shuttle through the shed with the proper rapidity, and consequently the pickensticks are often broken and soon worn out.

The object of the present invention is to dispense with the employment of a pickerstick and the provision of novel means for throwing the shuttle through the shed at the proper speed and with but little noise.

Referring to the drawings,-Figure 1 represents in end elevation a portion of a loom equipped with the invention. Fig. 2 represents a front elevation of a portion of the same. Fig. 3 represents a portion of a loom and shows the invention on an enlarged scale. Fig. 4 represents a plan view of the same. Fig. 5 is an edge view of the accelerating disk.

On the drawings, the end standard of the loom is indicated at 10, the lay at 11, and the swords at 12. Each end of the lay (only one end of the loom being shown) is provided with any suitable shuttle-box such as that indicated at 13. The shuttle-binder 14 is of any desirable construction such as that illustrated in my prior patent No. 654,916, dated July 31, 1900.

The bottom of the shuttle-box is slotted as at 15 for the reception of a picker 16. This consists of an upright block which is shod on its face with suitable material 17, such as layers of leather. This picker is adapted to move longitudinally of the slot, and is guided therein by a guide-bar 18, which is located below the upper surface of the lay. The bar 18 is located below the slot in the shuttle-box, and the picker is apertured to slide thereon.

For the purpose of operating the picker, and causing it to move from the outer end of the shuttle-box inward with a constantly accelerated speed, the following mechanism is employed: Immediately below the shuttlebox is a track 20. This consists of a bar secured to a sword in parallelism with the upper surface of the lay. Operating upon the track is a peripherally-grooved disk 21 around which is curved a flexible band 22 fastened at one point 210 thereto, one end ofv said band being secured to the end of the track 20, and the other end being secured to the lower end of the picker 16. By rolling the disk or operating member along the track, the picker is caused to move along the shuttle-box. The picker is normally returned to its outward limit of movement by a spring 23. For the purpose of causing the operating member 21 to move along the track, any suitable mechanism may be employed, one form of which is illustrated in the drawings. It consists of a rock-shaft 24, journaled in a bracket 240 attached to the inside of one of the standards 10. This rock-shaft has an upwardly projecting arm or lever 25, the free end of which is connected by a flexible strap 26 and, a yoke 27 with op positely projecting pins 28 (see Fig. 5) mounted eccentrically on the' faces of the disk 21, near the periphery thereof. Then the picker 16 is in its outward extreme of movement, the pins 28 are in substantially the position shown in Fig. 3. WVhen the arm 25 is rocked inward in the position shown by dotted lines, the member 21 is caused to roll along the track with a constantly accelerated speed, although the oscillatory movement of the arm 25 be constant or unvarying in speed. The arm 30 for the picking mechanism at the opposite end of the lay is mounted upon. a shaft 31 which is located parallel to that at 24. These shafts are rocked by a crank-armon the crank-shaft 32, which is adapted to rotate at a uniform speed, said crank-arm being swung first to one side and then to the other to engage an arm on the shaft 24 and upon its next revo lution engage an arm on the shaft 31. This particular form of mechanism is illustrated and described in Letters Patent No. 562,654, granted to me on the 23rd day of June, 1896, and needs no detailed description.

From the foregoing it is apparent that this invention provides a convenient and simple shuttle-picking mechanism which greatly reduces the wear and tear on the loom and which is gentle and easy in operation.

Having thus explained the nature of the invention, and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the modes of its use, I declare that What I claim is 1. A loom comprising in its construction a shaft adapted to rotate at a uniform speed, a picker for projecting the shuttle through the shed, a lever or arm actuated by said shaft, and speed accelerating means operated by said lever for imparting to said picker a gradually accelerating motion.

2. In a lo0n1, shuttle-picking mechanism comprising a normally retracted yielding picker, a track, a disk adapted to roll on said track, a flexible band of which one end is secured to said picker, the other end secured to a stationary part, and the intermediate portion curved partially around the periphery of said disk and fastened at one point thereto, and means for causing said disk to roll upon said track.

3. In a loom, shuttle-picking mechanism comprising a normally retracted yielding picker, a track, a disk adapted to roll on said track and having a stud eccentrically located thereon, a flexible band partially encircling the periphery of said disk and fastened by one end to said picker and by the other end to a stationary part, and means connected to said eccentric stud for imparting to said disk a gradually increasing rolling motion.

4. In a loom, shuttle picking mechanism comprising a normally retracted picker, a disk, a surface on which said disk may roll, a flexible band connecting said disk and picker, and means for causing said disk to roll on said surface with a gradually increasing speed.

5. In a loom, picking mechanism comprising a shuttle-box, a slot formed longitudinally therein, apicker adapted to slide in said slot, a spring normally holding said picker at its outward extreme, a lever'and speed accelerating means actuated by said lever for propellingsaid picker'toward the inner end of said slot with a gradually increasing motion.

In testimony-whereof I have affixed my signature, in presence of two witnesses. m1,

CHARLES F. PERHAM. I/Vitnesses 1 ,M. B. MAY,

0. O. STEcHER. 

